Machine for rounding the backs of books



(No Model.) 2 Sheets-Sheet 1.- J. A. WADE & H. D. STONE.

MACHINE FOR ROUNDING THE BACKS OF BOOKS.

No 317,689. Patented May 12; 1885.

.(No Model.) 2 Sheets-Sheet 2.

J. A. WADE & H. D. STONE. MACHINE FOR ROUNDING THE BACKS OF BOOKS.

Patented May 12, 1885.

* INVEN mas WITNESEEE NITED STATES" PATENT OFFICE.

J. AUGUSTINE WADE, OF CAMBRIDGE, AND HENBIE D. STONE, OF BOSTON, ASSIGNOBS TO THE CAMBRIDGEPORT DIARY COMPANY, OF CAMBRIDGE MASSACHUSETTS.

MACHINE FOR ROUNDING THE BACKS OF BOOKS.

SPECIFICATION forming part of Letters Patent No. 317,689, dated May 12, 1885.

Application filed July 23, 1884.. (No model.)

To all whom it may concern,-

Be it known that we, J. AUGUSTINE WADE, of Cambridge, in the county of Middlesex and State of Massachusetts, and HENRIE D.

STONE, of Boston, in the county of Suffolk and State of Massachusetts, have invgnted new and useful Improvements in Machines for Bounding the Backs of Books, of which the following is a specification.

This machine is for rounding the backs of books before the covers or bindings have been put on, and is intended to accomplish quickly, evenly, and with exactness this process, which is now commonly done by pounding the backs I 5 into a rounded shape by hand.

In the accompanying drawings, in which similar letters of reference indicate like parts, Figure l is a plan view of a machine embodying our invention. Fig. 2 is a vertical section on line 00, Fig. 1. Fig. 3 is a front elevation. Figs. 4, 5, and 6 are vertical sections showing the jaws in different positions, according to the different stages in the process of rounding the back of a book. Fig. 7 is a rear elevation 2 5 of a portion of the machine.

A represents the frame of the machine, adapted to be secured to a bench or table.

B is the driving-shaft, turning in the boxes B, and provided with the pulley b, by means 0 of which power is applied, and. the balancewheel I).

A gear-wheel, C, is rigidly secured to the shaft B,and engages with a gear-wheel, D, rigidly secured to the shaft D, turning in the 5 box d and having its opposite end fast in the disk 0. A short connecting rod or shaft, 6, is eccentrically placed in the disk 6, and extends to the central disk, f, as shown in Fig. 7, being eccentrically placed therein. A short shaft,

g, connects the disk f eccentrically with the disk g, which is rigidly secured to the shaft E,

turning in the box E. It will readily be seen that the parts D e c f g g E form practically a double crank-shaft.

F and G are double or forked levers, loosely secured, respectively, to the short shafts c and g, which form the crank portions of the crank-shaft above alluded to, and fulcrumed at F and G in the frame. The short arms F and G of these levers are preferably slightly bent, as shown in Fig. 2, from the lines of the long arms, and lie in openings h i in the jaws H I. The parts H I are really the bases for the true jaws J K, which are adjustably secured to said bases by the bolts J and the screws L, adapted to raise and lower the jaws J K by means of the gear-wheels M, connected by the gear-wheel N, so that both wheels M may be turned at the same time and an even adjustment secured. It will be understood that the wheels M run on the thread of the screws which pass through the overhanging shoulders H I of the jaws H I, and are secured in the jaws J K.

O P are auxiliary spring-jaws secured to the jaws J K by means of the bolts O and slots 0 P, and adapted by means of the springs R to extend a little farther inward than the jaws J Y K, and allowed a free sliding motion by means of said bolts and nuts.

S S are guide-pins adapted, by lying against springs, as shown in Fig. 5, to yield as the jaws J K approach each other.

T is an adjustable table secured to the frame A.

In practical operation the machineworks as follows: Power being applied to the pulley b, the crank-shaft, composed of the parts D e e f g g E, is rotated by means of the shaft B and gear-Wheels C D,with the efi'ect of simul taneously separating the rear ends of the levers F G, thus drawing the jaws toward each other by the action of the short arms F G, and drawing the long arms toward each other, with the effect of opening said jaws alternately. The book U is laid on the table T with its back toward the machine, and pushed against the pins S. As the jaws approach each other, the spring-jaws 0 P first reach the book, as shown in Fig. 4, and as they continue to come nearer together the pressure of the springs B causes the spring jaws O P to press against the opposite sides of the book U, drawing forward (away from the machine) a little the outer leaves,thus commencing the round- 9 5 ing process before the main jaws J K touch the book, as shown in Fig. 5. As the main jaws J K continue to approach the book, they I what we claim, and desire to secure by Letters finally reach it, and press with great power upon it, completing the rounding process, as shown in Fig. 6. V V

It will be observed that the jaws are set at angles to each other, not on a line, so as to produce the rounded back to perfection.

The auxiliary spring-jaws O P are for two principal purposesviz., to grasp the book first and hold it for the main jaws, and to commence the rounding process, so that the main jaws will complete it in the right direction-4'. 0., make a convex not a concave back. 7

The adjustability of the jaws allows for books of different thicknesses, and provides for greater or less pressure, and the table is of course made adjustable as to height for the former purpose.

Having thus fully described our invention,

Patent, is

1. The combination of the jaws H I, provided with the openings h t, and the levers F F G G, fulcrumed at F G to the frame A of the machine, substantially as and for the purpose set forth.

2. The combination of the jaws H I, levers F F GG, the shafts c g, disks 0 fg, shafts D E, frame, and driving mechanism, substantially as arranged and constructed, and for the purpose described.

3. The combination, with the jaws J K, of the auxiliary spring-jaws O P, adapted and placed, as shown, to reach the book before the jaws J K, substantially as and for the purpose set forth.

4. The combination of the jaws J K, provided with the springpins S, the jaws O P, provided with the slots 0 P and bolts 0, andthe springs It, substantially as and for the purpose described.

J. AUGUSTINE MADE. HENRIE D. STONE.

Witnesses:

HENRY W. WILLIAMS, JosEPrI IsHBAUerI. 

